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title: "Yoshio Shirai"
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# Yoshio Shirai

Nationality: Japan

No current ranking in the latest published lists.

## Ranking history

| Month | Organization | Division | Rank |
| --- | --- | --- | --- |
| June 1955 | RING | Flyweight | #8 |
| May 1955 | RING | Flyweight | #3 |
| April 1955 | RING | Flyweight | #3 |
| March 1955 | RING | Flyweight | #3 |
| February 1955 | RING | Flyweight | #1 |
| January 1955 | RING | Flyweight | #1 |
| November 1954 | RING | Flyweight | Champion |
| October 1954 | RING | Flyweight | Champion |
| September 1954 | RING | Flyweight | Champion |
| August 1954 | RING | Flyweight | Champion |
| July 1954 | RING | Flyweight | Champion |
| June 1954 | RING | Flyweight | Champion |
| May 1954 | RING | Flyweight | Champion |
| April 1954 | RING | Flyweight | Champion |
| March 1954 | RING | Flyweight | Champion |
| February 1954 | RING | Flyweight | Champion |
| November 1953 | RING | Flyweight | Champion |
| October 1953 | RING | Flyweight | Champion |
| September 1953 | RING | Flyweight | Champion |
| August 1953 | RING | Flyweight | Champion |
| July 1953 | RING | Flyweight | Champion |
| June 1953 | RING | Flyweight | Champion |
| May 1953 | RING | Flyweight | Champion |
| April 1953 | RING | Flyweight | Champion |
| March 1953 | RING | Flyweight | Champion |
| February 1953 | RING | Flyweight | Champion |
| January 1953 | RING | Flyweight | Champion |
| November 1952 | RING | Flyweight | Champion |
| October 1952 | RING | Flyweight | Champion |
| September 1952 | RING | Flyweight | Champion |
| August 1952 | RING | Flyweight | Champion |
| July 1952 | RING | Flyweight | Champion |
| June 1952 | RING | Flyweight | Champion |
| May 1952 | RING | Flyweight | Champion |
| April 1952 | RING | Flyweight | #1 |
| March 1952 | RING | Flyweight | #1 |
| February 1952 | RING | Flyweight | #1 |
| January 1952 | RING | Flyweight | #1 |



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